| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
In cell biology, where does DNA replication take place?
mitochondria |
|
nucleus |
|
Golgi apparatus |
|
cytoplasm |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
During digestion, the kidneys filter substances from the blood. Which of the following is not filtered by the kidneys?
salt |
|
fats |
|
minerals |
|
water |
Chemical waste like excess water, minerals, and salt are filtered from the blood by the kidneys and secreted into the urine. Urine is transported from the kidneys to the bladder through ureters.
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
atom |
|
neutron |
|
proton |
|
electron |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
Which of the following is not one of the outer planets?
Jupiter |
|
Neptune |
|
Uranus |
|
Venus |
In contrast to the solid terrestrial planets, the outer planets (Jupiter, Saturn, Uranus, and Neptune) consist of hydrogen and helium gas and water.
Which of the following is the primary difference between a comet and an asteroid?
asteroids have a coma |
|
asteroids contain frozen water |
|
comets have an atmosphere |
|
comets orbit the Sun |
A comet is a loose collection of ice, dust, and small rocky particles that, in contrast to an asteroid, has an extended atmosphere surrounding the center. When passing close to the Sun, this atmosphere warms and begins to release gases forming a visible coma or tail.